Cisco Systems Cisco uBR10012 manual How to Identify an RJ-45 Crossover Cable, Pin 1 Pin

Appendix B Cable Specifications

Fast Ethernet Port Cables and Pinouts

•Use a Category 3 UTP straight-through cable when connecting to a PC or other Ethernet device.

•Use a Category 5 UTP crossover cable when connecting 100Base-TX to a hub.

•Use a Category 5 UTP straight-through cable when connecting to a PC or other Ethernet device.

Note Cisco Systems does not supply Category 3 or Category 5 UTP RJ-45 cables; these cables are available commercially.

How to Identify an RJ-45 Crossover Cable

You can identify a crossover cable by comparing the two modular ends of the cable. Hold the cables side-by-side with the tab at the back. The first (far left) colored wire (pin 1) at one end of the cable is the third colored wire (pin 3) at the other end of the cable. The second colored wire (pin 2) at one end of the cable is the sixth colored wire (pin 6) at the other end of the cable. See Figure B-4.

Figure B-4 Crossover Cable

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

127839

Figure B-5 RJ-45 Crossover Cable Identification

Pin 1 Pin 2

Pin 3

Pin 6

62741

Cisco uBR10012 Universal Broadband Router Hardware Installation Guide

OL-18259-01 B-5